Star Trails around Polaris

>> YOUR LINK HERE: ___ http://youtube.com/watch?v=XTTDWhky9HY

Two versions of a series of images facing Polaris (our north celestial pole) illustrate, when animated, the rotation of our earth.

astronomy, polaris, star, trails, animation, big, dipper, cherry, springs, little, ursa, major, north, celestial, pole, rotation
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